Question

which stages of cellular respiration require oxygen?
glycolysis
krebs cycle
electron transport chain
which of the following is considered a waste product of cellular respiration?
atp
oxygen
glucose
carbon dioxide
plants undergo cellular respiration.
true
false

Explanation:

• Cellular Respiration Stages Requiring Oxygen: Glycolysis occurs in the cytoplasm and does not need oxygen. The Krebs Cycle (also known as the citric acid cycle) occurs in the mitochondrial matrix and does not directly use oxygen. The Electron Transport Chain (ETC) in the inner mitochondrial membrane uses oxygen as the final electron acceptor.
• Waste Product of Cellular Respiration: ATP is the energy - rich molecule produced. Oxygen is consumed (not a waste product). Glucose is the starting molecule. Carbon dioxide (\(CO_2\)) is a waste product (e.g., from the Krebs Cycle).
• Plants and Cellular Respiration: Plants, like all living organisms (except some obligate anaerobes), carry out cellular respiration to produce ATP. They also carry out photosynthesis, but cellular respiration is a separate process that occurs in their cells.

Answer:

• For "Which stages of cellular respiration require oxygen?": Electron Transport Chain.
• For "Which of the following is considered a waste product of cellular respiration?": carbon dioxide.
• For "Plants undergo cellular respiration.": True.